Cook a rib, perhaps, with a little seasoning (6)
I believe the answer is:
braise
'cook' is the definition.
(I know that braise is a more specific form of the action cook)
'a rib perhaps with a little seasoning' is the wordplay.
'perhaps with' indicates an anagram.
'little seasoning' becomes 'se' (I can't justify this - if you can you should give a lot more credence to this answer).
'rib' anagrammed with 'a' gives 'brai'.
'brai'+'se'='BRAISE'
Can you help me to learn more?
(Other definitions for braise that I've seen before include "Fry and then stew (food)" , "13 across (anag)" , "Re bias (anag.)" , "Cook by stewing" , "Cook slowly with little liquid in closed container" .)